REFLECTOR: Jeffco question

[Rene Dugas]

This event may not apply but it might prevent a lot of trouble if
someone repeats my mistake.  I did not use Jeffco but used thickened
Cabo and resin as per the original recommendations.  My garage was cold
so I place a small electric heater under the plane to accelerate the
cure when I was through one evening with expected temp possible in the
low 50's.  This added heat caused out gassing over night of the pin
holes in the bottom strakes and gave me thousands of small pock marked
divits with dreadful results.  I was forced to sand out most of the
whole layer and start over.  The next time I reversed the procedure and
heated the strake slightly for three hours until I poured the mixture
into the strake.  As the strake cooled slowly over the next few hours
the covered pin holes sucked the mixture into the holes and I have no
leaks and a perfectly smooth result.  Just food for thought.  Your
results may vary.

Rene'

 

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Grigore Rosu
Sent: Friday, February 08, 2008 10:18 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Jeffco question

 

Kurt,

 

The Jeffco I have was ordered about 10 days ago from Velocity.  I got 3
gallons, which should be more than needed.  I just did a bit of Jeffco
mixture using the proportions above and I included the cabosil and the
flox, as Scott suggested; what I got was a very thick paste; there is no
chance to brush that ... I should get something thinner.

 

Grigore

On Feb 8, 2008 7:14 PM, <NMFlyer1 at aol.com> wrote:

Grigore,

 

Ronnie is right. You don't need the fillers for the coating. You are
also right in that you can't mix too much of that stuff at a time
without it "Therming" on you. It does cure faster and makes lots of its
own heat. 

 

There is a tool called a "Nit Picker" It is a very fine tapered wire
with a little handle. It's purpose is to be able to pick bugs, lint,
(AKA Nits) out of your paint before it dries. It looks like a metal cat
whisker with a handle. 

The tip is so fine, that you can pull things from paint without
disturbing the finish (if you are quick enough). 

 

It has such a fine tip that it makes a perfect tool for popping tiny
bubbles in Jeffco while it is still wet. Bout 9 bucks at a professional
auto paint supply store.

 

The Jeffco that I used along the top of the baffles is a different
epoxy. They also have a structural epoxy. This may be where you thought
I used filler with regular Jeffco. 

 

Hope that helps. 

 

Kurt 





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